Pump valve



c. BROWN PUMP VALVE Jan. 19, 1937.

Filed May 16, 1932 Patented Jan. '19, 1937 n aoesaai rum" VALVE Colin Brown, Rochester, Y. h Application Ma; lei-1932, Serial No. 611,491

, n '2 Claims. (01. 251-119)" I This invention relates to valves for pumps and has for its object to provide an improved elastic body for such a valve and combine therewith the fasteninga'nd mounting means for the valve.

description thereof which follows, ref erence' being had to the'accompanying drawing inwhich Figure 1 is af'partial side elevation and sec'-; tional view of a pump cylinder provided with my improved valver FigureZ is a I H of the pumpcylinder illustrating the action of my improved'valve.

Figure 31s a top plan view of the end of the I pump cylinder with the valve indicated in dotted lines thereon.

Flgureeis a" horizontal sectional view of the pump cylinder taken on the line 4-4 of Figure 1 n and loolgingin the direction of the arrow.

Figure 5 'is 'a detail side elevation of the valve.

.In'the'several figures of the drawing like refere'nce'numerals indicate like parts.

, in a t'ank sothaton the operation of the pump a so,

i The pa re vaive forming the subject matter of I my 'present 'invention is especially adapted for use'in sprayersin which the pump is mounted the fair pressure created thereby will force the liquid contained in the tank in a spray thru the outlet thereof.

. prises a. flexible disc I which is preferably made of rubber or other flexible material and is nor- =mally 'convexed' at the top and flat or even slightly concaved at the bottom. From the center' of the bottom of the disc projects a short." valve stem '2 which terminates in the head 3 so as to form an annular groove 4 between, this head and the underside of the valve. disc L; Both thestem 2 and the head 3 are preferably. integral with the valve disc and are therefore" made up of the. same flexible and resilient material as the disc. 7 I

The valve m Ollintedton th utside of the 1 In a valve the combination of a concaved cylinderlfiefidiipiithe vpump cylinda-i silient rubber valve disc'having a feather edge 6. In thecenterof thls. cylinder head isprovided a hole 1 and aroundthishole regrouped 1 the outlet or port openings 3, 8. v Theheadi of the valve! is taperedso as to readily center itself over the hole I when mounting the valve to the cylinder head. The head 3 isalso larger than the hole I but due to its'taper and its com-,

' pressibility the head will compress and pass thrii the hole when forced therethru. After passing thru the'hole l the head 3 expands on the in- This and other objects of this invention will become more readily apparentfrom a' detailed detail sectional view of the end As illustrated in thefflgures the valve vcomside of the cylinder head while the'edge of the whole projects into the annular groove 40! the valve. This locksthe valve to the cylinder.

In mounting the valve, as above described, the

head 3 thereof draws thev'alve disc into the valve seat provided by the concaved cylinder,

head and'flexes the flat or'concaved under side of the valve disc into a convex shape to conform to the curvature of thevalve seat on the cylinder head. The cylinder head' thus'forms the seat for the'valve disc and due to the flexing of the valve disc in the mounting of it, thetension produced in the'flexible material of the valve disc yieldingly holdsthe under 'side'of the valve disc in place on the concaved seat and closes the port holes 8, 8 provided therein. The original convex top of the valve disc provides the valve with a firm central body'portion which yields but litgradually increase the flexibility of the outer portion of the disc so that the outside of the valve has a feathering edge.

" tle. However the tapered'sides of the valve disc 'The valve thus'automatically holds its valve disc at a predetermined tension on the'valve seat: formed by the end of the cylinder head and normally keepsthe port openings in the cylinder head closed. A's air is forced out of the port holes ofthe cylinder, the valvedisc is raised over the port holes by the pressure of the air to allow the air to escape'from under the valve disc as illustrated in Figure 2. The flexibility and rej siliency of the material from which the valve is madeand the tension under which it is held anchored to the valve seat, will again seat the valve on the cylinder head to close the. port openings therein as soon as the air has been forced out offthe cylinder; Any pressure of air or liquid in the tank which surrounds the cylinder will of course assist in re-seating the valve andskeep the valve seated to hold the port open ings'd closed until forced openiby air compressed within the cylinder. I claim:

and a substantially flat bottom, an elastic rubber valve stem at the bottom of said disc integral with said disc, and a compressible rubber head at the end of said valve stem integral therewith, a

concave valve seat having a central opening therein and a valve opening eccentric thereto,

said elastic rubber valve stem extending thru said central opening to have said rubber head hold said 'valve disc with its flatbottomflexed into said valve seat to yieldingly close said valve opening.

2. A pump valve member comprising a resilient valve disc having a feather edge with a substantially flat bottom, an elastic rubber valve stem at the bottom of said valve disc, a compressible head at the end of said valve stem having a flat surface opposing the substantially flat bottom of said valve disc and a conical bottom to permit the ready insertion of said head and the compression thereof thru an opening smaller than said head and have the opposing surfaces of said head and valve disc seal the opening around the valve stem.

3. The combination of a concave valve seat, said valve seat having a central opening and a valve port eccentric thereto, a rubber valve disc having a convex back and a normally substantially flat face, and a valve stem anchored in said central opening of said valve seat to convex the normally substantially flat face into said concave valve seat and hold said valve port closed by the pressure exerted by said flexed valve disc.

4. A pump valve for a concaved valve seat having anchoring means and a port opening provided therein to one side of said anchoring means, a rubber valve disc having a convexed back and a normally substantially flat face on the under side thereof, and a valve stem anchored to said anchoring means to hold said normally flat face of said valve disc convexed into said concave valve seat to close the valve port by the pressure exerted by the flexed valve' opening to one side thereof, the combination of v 1 a rubber valve disc having a substantially convex top and a substantially flat bottom so as to provide the disc with an edge of increasing flexibility, a flexible valve stem in the center of said flat bottom and a compressible head on the end of said valve stem and spaced from the flat bottom of said valve disc a distance substantially the same as the length of the anchoring hole thru said valve seat so as to cause said head and valve stem to flex said flat bottom of said valve -disc into said concave valve seat and exert pressure against the valve port.

6. In combination with a concave valve seat having a port opening and fastening means associated with said valve seat, of a flexible valve disc having a convex back and a normally substantially flat face and fastening means provided bility, a valve stem in the center of said flat bottom of said disc and ahead on the end of said valve stem and spaced'from the flat bottom of said disc 9. distance substantially the same as the length of the anchoring hole thru said valve seat so as to cause said head and valve stem to flex said flat bottom of said valve disc into said concave valve seat and exert pressure against the valve port.

' COLIN BROWN. 

